Cutter-grinding machine



(No Model.) 2 Sheets-Sheet 1.

A. BENDER. 1

K GUTTER GRIVNDING MAGHINE. No. 412,589 A Patented Oct. 8, 1889.A

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2 Sheets-Sheet 2.

'Patented Oct. 8, 188,9.

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(No Model.)

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' GUTTER GRINDING MACHINE.. No. 412,589.

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vtable B, around the axis thereof, are seg- UNITED )STATES `PATENTOFFICE.

" ADAM B-ENDER,V or PHILADELPHIA, PENNSYLVANIA.

`CUTTER-GRINDING MACHlNE.

SPECIFICATION forming part of Letters Patent No. 412,589, dated October8, 188.9.v

' Application nea Dcl-.mbar 21,1288. serial No. 294,262. N0 model.)

Be it known that I, ADAM' BENDER, a citizen of the UnitedStates,'residing in the city and county of Philadelphia, State of Penn-Sylvania, have invented'a new-and useful Improvement in UniversalCutter-Grinding Machines, which improvement is fully set forthl in thefollowing specification and accompanying drawings. r

`My invention consists of a machine for grinding cutters andotherimplements embodyingnovel means, as hereinafter described and claimed,for adjusting the holder of the cutter or implements invarious angles inlateral directions relatively to the emery or grinding wheel.

It also consists of novel means, as hereinafter described and claimed,for raising and lowering said holder for adjusting thecutter orimplement in Various angles in vertical directions relatively to the'emery or grinding wheel.

Figure 1 represents a top or plan View of a grinding-machine embodyingmy invention. Fig. 2 represents a partial side elevation and partialvertical section thereof. Fig. 3 represents a partial side elevation andpartial vertical section of a portion in line x, Fig. 1, on an enlarged`scale. Fig. 4 represents a section on line y y, Fig 3. Fig. 5 representsa section of a portion on line ,e z, Fig. 1, on an enlarged scale. Fig.6 represents a side elevation'of a graduated plate andan index or figureof the machine.

.Similar letters and numerals of reference indicate corresponding partsin the several figures.

Referring to the drawings, A represents the bed of the machine, and Brepresents a carriage which is pivotally mounted upon a table C, thelatter being iitted upon a support D, which rests on the bed A, it beingseen that the table may be moved on the said support D and t-he lattermoved on said bed A, the motions of said table and support being at aright angle to each other. In the mental slots E, and through said slotsare passed screws F, which are fitted in openings in the table C, sothat when screws are loosened the carriage B may be readily turned onits axis, thus presenting the cutter or tool or implement to be groundat an angle to the emery or other wheel G. The center of the side of thecarriage B has secured to it a graduated plate H, curvilinear drawn fromthe axis of said carriage, and adjacent thereto is an index or finger J,which points to the graduations, by which provision the angle of thecarriage may be set with precision.

K represents a carrier, which is provided with a holder L for the shaftAof the cutter to be ground, said holder being adapted to clamp saidshaft and firmly hold the same. The carrier is of the form of a diskhaving a graduated periphery M, and is connected by a screw M with aplate N, whose back is formed with ears P, adjacent to which are ears Qon an upright plate R, said ears being connected by screws S as axes,whereby the carrier K may be raised and lowered, as will be hereinafterset forth. Projecting from the plate N, back of the axial portionthereof at what may be termed its heel, are ears T, through which isfreely passed a pin Ior rockshaft U, the same having a threaded openinga, to which is fitted a screw W, which is swiveled to the upright plateR. It will be seen that owing tothe boltor screw M the carrier K may beturned'on the plate N, so as to set the sides of the cutter at variousangles to the wheel G, as illustrated in the dotted lines,

Fig. l. When the carrier is adjusted, the screw M is tightened, wherebysaid carrier firmly retains its adjusted position, the carrier thenbeing advanced to the wheel G, so that the sides ofthe cutter orimplement may be ground.

In order to raise or lower the carrier K, and consequently the holder L,the screw W is properly rotated, whereby, owing to the connection ofsaid screw with the rock-shaft U in the ears T of the plate N, saidcarrier turns on its axis, thus adapting the cutter or other implementto have its back or other proper portion of the cutter presented to thewheel Gat diiferent angles, as will be seen by the dotted lines, Fig. 2.The plate R is freely connected with the upright portion B of thecarriage B by means of a screw X, fitted to said portion B andtightening against said plate. By this provision the carrier, andconsequently` the holder, may be laterally adj usted on the carriage B,according to require- IOO ments. The plate R is provided with a tongueR', which enters a groove R2 in the portion B, thus steadying saidplate. Connected with the ends of the carriage B are centers Y, forholding reamers, &c., to be ground, and pivoted to the end of the bed Ais a holder Z for a twist-drill, said holder being formed of jointedarms, so that the drill may be readily presented to an emeryor grindingwheel and firmly held during the grinding operation, it being seen thatthe shaft l of the grindingwheel G carries on the end adjacent to thedrill-holder Z a grinding-Wheel G.

Between the bearings 2 of the shaft l is the driving-pulley 3, which isprovided with the fastening-screw l. At the ends of said pulley, on theinterior lthereof, are shoulders 5, within which are collars 6, thclatter encircling the shaft l. The inner sides of said collars arebeveled, andagainst the same bear the conical points of screws 7, thelatter passing through the pullej7 3. It will be seen that owing to thescrew 7 the collars 6 may be forced against the contiguous portions ofthe bearings 2, thus forming tight joints between -the parts, preventing'emery or dust from reaching the shaft l.

A set-screw 8 is provided for causing the collars 6 to rotate with thepulley.

In order to prevent return of the cutter, I employ a tooth or dog 9, ofspring metal, the same being adjustably connected with the frame A andacting as a pawl, engaging with the teeth of the cutter for preventingreverse rotation thereof.

Having thus described my invention, whatI claim as new, and desire tosecure by Letters Patent, is-

l. In a cutter-grinding machine, a bed A, having the inovable support Dthereon, the table C, movable on said support, and the carriage B,pivotally mounted on said table,

the graduated plate H, secured to the center of the side of the carriageB, and the indexlinger J, the latter being curvilinear drawn from theaxis of the said carriage, said parts being combined substantially asdescribed.

2. A tool carrier or holder, in combination with a plate to which saidcarrier or holder is pivoted, arock-shaft in the heel end of saidcarrier or holder, and a screw fitted to said plate and engaging withsaid rock-shaft, substantially as described.

3. In a cutter-grinding machine, a carriage with upright portion, anupright frame with ears, a plate with ears, pivotal screws connectingsaid ears of plate and upright, and a carrier with holder connected withsaid plate, said parts being combined substantially as described.

4. In a cutter-'grinding mechanism, a carriage, an upright plate securedto said carriage, a plate pivotally connected with said upright plate,arocking shaft journaled in said pivoted plate and having a screwthreadedopening, a screw-bolt swiveled in said upright plate and Working in saidopening in the shaft, and a carrier with holder secured to said pivotedplate, said parts being -combined substantially as described.

5. In a cutter-machine, a rotary shaft with grinding-wheel thereon, apullej7 mounted on said shaft between the bearings thereof and havingshoulders 5, a beveled `collar encircling the shaft adjacent to saidshoulders and bearings, and a screw working in thel pulley with itspoint bearing against the beveled face of the collar, substantiallyasaiid folthe purpose set forth.

' ADAM BENDER. Witnesses:

JOHN A. WIEDERSHEIM, JAMES F. KELLY.

